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GREYUIT [131]
3 years ago
5

What was the procedure during the first successful vaccination?

Biology
2 answers:
netineya [11]3 years ago
4 0
The smallpox vaccine, introduced by Edward Jenner in 1796, was the first successful vaccine to be developed. He observed that milkmaids who previously had caught cowpox did not catch smallpox and showed that inoculated vaccinia protected against inoculated variola virus
Mekhanik [1.2K]3 years ago
4 0
Sheeeeeeeesssshhhhhhhhh
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Calculate the mass of a liquid with a density of 3 g/mL and a volume of 20 mL.
yawa3891 [41]

Given that,

Density of the liquid, d = 3 g/ml

Volume, V = 20 mL

To find,

The mass of the liquid.

Solution,

The density of an object is given by its mass divided by volume such that,

d = m/V

m is mass

m = d×V

Put all the values,

m = 3 g/mL × 20 mL

= 60 grams

Hence, the mass of a liquid is 60 grams.

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3 years ago
What is the use of chloroplast?
Arisa [49]

Chloroplasts absorb sunlight and use it in conjunction with water and carbon dioxide gas to produce food for the plant. Chloroplasts capture light energy from the sun to produce the free energy stored in ATP and NADPH through a process called photosynthesis.

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3 years ago
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mars1129 [50]

Answer:

Hola,  tu respuesta es B. Gas Carbonico

Explanation:

8 0
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Use the following information to answer the question.
marysya [2.9K]

If the isthmus formed gradually rather than suddenly, the morphological species, biological species, and phylogenetic species concepts.

<h3>What is Isthmus genetical species?</h3>

The formation of the Isthmus of Panama, a slender land bridge that connects North and South America, caused the Pacific and Caribbean populations of marine organisms to split off about 3 million years ago.  On both sides of the isthmus, different species of snapping shrimp have been studied. There appeared to be seven pairs of species, with one species of each pair being found in the Pacific and the other in the Caribbean, according to the morphological species concept.

The various species pairs inhabit slightly different ocean depths. These species pairs, which are divided by the isthmus, were indeed the closest relatives of one another, according to the researchers' estimates of phylogenies based on mitochondrial DNA sequences.

To learn more about isthmus visit:

brainly.com/question/24148015

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7 0
1 year ago
In what situation does anaerobic respiration take place
Ierofanga [76]
<span>When there is no oxygen, or the organism cannot use oxygen for respiration. 

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3 years ago
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